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dimensions, tolerances and assemblies - Coggle Diagram
dimensions, tolerances and assemblies
dimensioning
impacts assembly construction
types and importance of dimesioning
Dimension Line
Dimension Text
base dimension
Usually uses the units in mm
types of dimensioning
dimensioning of radius
parallel dimensioning
Shares the same reference surface that consists of various dimensions
superimposed running dimensioning
reduces parallel dimensioning which leads to saving space on drawing
dimensioning of small features
arrow heads outside the extension line for clear reading
dimensioning of multiple features
N x Dimension [to make multiple same dimensions]
combined dimensioing
uses both chain and parallel dimensioning
chain dimensioning
only used when the growth of tolerances does not impact the product's function
dimensioning angles
curved dimension line and has a degree symbol
circle, arc and hole
arc - by its radius
holes - located by centerlines
circle - dimensioned by diameter
Tolerance
allows connecting part to connect properly
improves quality control
without tolerance, must have exact measurements of product
the range differs as production degree differs
types of tolerance
Limit
has an upper and lower range
Bilateral
goes both way - equal
Unilateral
goes one way
formula
upper limit - lower limit
2 types of fitting
clearance fit
an allowance available for two parts to move
interference fit
hard to take out or put in back
Assembly Modelling
combines parts to depict a product